As of 1950, the following quantities of tank cars were rostered in North America, according to the Official Railway Equipment Register (ORER). This list does not include milk tanks, vinegar tanks, pickle tanks or tanks specifically denoted for company service. Compiled by Jerry Britton.
| Railroad | Reporting Marks | Tank Cars |
|
Lessees include Atlantic Refining Company, Baker's Chocolate, Eastman Chemical, Hercules Powder, Products Tank Line, Procor Limited, |
UTLX, UTCX, UTX, PX |
42,488 |
|
General American Transportation Corp. - Lessees include Celanese Chemicals, Diamond Chemical, Domino Sugar, |
GATX | 37,696 |
|
Lessees included Bell Oil & Gas Company, Cities Service Oil Company, Dow Chemicals, FMC Corporation, |
SHPX, SERX, PCIX |
9,974 |
| Sinclair Refining Company | SDRX, UNPX, PARX, FMTX | 5,086 |
|
Lessees include A. E. Staley Mfg. Co. |
NATX | 4,459 |
| General American Transportation Corp. - The Texas Company |
TCX | 3,773 |
| Department of the Army | CWSX, USAX, USOX, USQX | 3,396 |
| Canadian General Transit Company | CGTX | 2,387 |
| Warren Petroleum Corporation | WRNX | 2,246 |
| Southern Pacific Lines West of Portland, Ogden, El Paso and Tucumcari |
SP | 2,068 |
| Ferrocarriles Nacionales de Mexico - Operating National Railways of Mexico, Interoceanic Railway of Mexicoand MExican Southern Ry. TehuantepecNational Railway |
N de M, N de T | 2,048 |
| Cities Service Oil Company | CSOX, EORX | 1,672 |
| Mid-Continent Petroleum Corporation | COSX | 1,590 |
| Petroleos Mexicanos | PMEX | 1,514 |
| Gulf Oil Corporation | GRCX | 1,508 |
| Transite Company, Limited | TCLX, CSGX, BMMX, PRPX, SUPX | 1,464 |
| Mexican Petroleum Corporation | MPLX | 1,403 |
| Allied Chemical & Dye Corp. - Barrett Division |
BMX | 1,305 |
| Tide Water Associated Oil Company | AOX, TIDX, TWOX | 1,253 |
| Socony-Vacuum Oil Company, Inc,, Central Region |
SVX | 1,175 |
| Union Pacific Railroad Company | UP, OSL, OWR&N, LA&SL | 1,081 |
| Sun Oil Company | SUNX | 952 |
| Imperial Oil , Limited | IOX, COBX | 910 |
| E. I. Du Pont de Nemours & Company | DUPX | 736 |
| Continental Oil Company | CONX | 721 |
| Magnolia Petroleum Company | MPCX | 716 |
|
Keith Railway Equipment Company Lessees include Publicker-Ward Distilling Co. |
KTX, NRNX | 687 |
| Champlin Refining Company | HHCX, LENX | 685 |
| Allied Chemical & Dye Corp. - Solvay Process Division | SPX | 676 |
| Phillips Petroleum Company | PSPX | 668 |
| Allied Chemical & Dye Corp. - General Chemical Division |
GCX | 653 |
| Union Oil Company of California | UOCX | 626 |
| Cosden Petroleum Corp. | CPCX | 591 |
| Shell Oil Company, Incorporated | SCCX | 587 |
| Lion Oil Company | LUX | 549 |
| General American Transportation Corp. - Swift Tank Line |
SWTX | 505 |
| Southern Pacific Lines in Texas and Louisiana |
T&NO | 448 |
| Reconstruction Finance Corporation | DPX | 440 |
| California Dispatch Line | CDLX | 396 |
| Ethyl Corporation | EBAX | 389 |
| Shell Chemical Corporation | SCMX | 389 |
| Lone Star Producing Company | LSPX | 385 |
| North American Car Corp. | AESX | 336 |
| Interstate Tank Car Corporation | ISTX | 327 |
| Bay Terminal Railroad Co. | BTRR | 325 |
| Vendome Tank Car Company | VENX | 318 |
| United States Navy | USNX | 316 |
| O. E. Linsin, Inc. | OELX | 294 |
| General American Transportation Corp. - Linde Air Products Company |
LAPX | 283 |
| Monsanto Chemical Company | MONX | 263 |
| Pan-Am Southern Corporation | PASX, RUTX | 263 |
| East Jersey Railroad and Terminal Co. | EJR | 260 |
| El Dorado Refining Co. | EDRX | 259 |
| Crystal Car Line | CCLX | 257 |
| Armor Tank Line | ATLX | 241 |
| Pennsylvania Salt Manufacturing Co. | PSMX | 235 |
| Standard Brands Inc. | SBIX | 235 |
| Allied Chemical & Dye Corp. - Semet-Solvay Division |
SSLX | 214 |
| Richfield Oil Corporation | ROX | 211 |
| West Coast Transportation, Inc. | WCTX | 201 |
| Harbor Tank Line Company | HTCX | 199 |
| General American Transportation Corp. - Pennsylvania-Conley Tank Line |
CYCX | 188 |
| Kansas City Southern Ry. Co. | KCS | 182 |
| Ozark Tank Car Company | OZKX | 181 |
| Mathieson Chemical Corporation | MAWX, SASX | 180 |
| Toronto Pipe Line Company | TBAX | 178 |
| Hercules Powder Company | HPCX | 177 |
| Commercial Solvents Corporation | CSVX | 176 |
| Consolidated Chemical Industries | CCIX | 176 |
| Pioneer Equipment Company | PECX | 176 |
| Painter Transportation Service | PTSX | 175 |
| Canadian Industries Limited | CILX | 171 |
| John H. Grace Company | DRDX | 170 |
| Koppers Company | KPCX | 167 |
| Johnson Oil Refining Company | JORX | 165 |
| Chicago & North Western | C&NW | 162 |
| Anchor Petroleum Company | ANPX | 158 |
| United Fuel Gas Company | UFGX, VGOX | 152 |
| McColl-Frontenac Oil Co., Limited | MFLX | 148 |
| Hooker Electrochemical Company | HOKX | 147 |
| Pittsburgh Plate Glass Company, Columbia Chemical Division |
PPGX | 145 |
| General American Transportation Corp. - Scurlock Tank Car Company |
ECSX | 143 |
| Kanotex Refining Company | KOTX | 140 |
| Dow Chemical Company | DOWX | 135 |
| Dow Chemical Company - Texas Division | DTDX | 132 |
| Niagara Alkali Company | NACX | 125 |
| Ferrocarril Mexicano | FCM | 122 |
| Crown Central Petroleum Corporation | CCPX | 129 |
| Elk Refining Company | ERCX | 126 |
| Philadelphia Quartz Company | PQX | 118 |
| Canadian Oil Companies, Limited | CNOX | 117 |
| Southwestern Sugar & Molasses Company | SSMX | 116 |
| Chartrand's Traffic Service | CHAX, OORX | 113 |
| United Refining Company | URCX | 108 |
| Midland Cooperative Wholesale, Cushing Refining Division |
CRGX | 107 |
| Howard Tank Line | ORHX | 106 |
| Great Western Division, Dow Chemical Company |
GWEX | 105 |
| Best Foods, Inc. | BFX | 103 |
| Ferrocarril Nor-Oeste de Mexico, S. A. Mexico North-western Railway |
N-O de M | 103 |
| Missouri Pacific Lines - Gulf Coast Lines - International Great Northern Railroad Co. |
IGN | 101 |
| Walter Haffner Company | WCHX | 99 |
| Carbine and Carbon Chemicals Division - Union Carbide and Carbon Corporation |
CCBX | 91 |
| Fort Worth and Denver City Railway Co. | FW&D | 91 |
| General Petroleum Corporation | GPCX | 91 |
| North Star Oil Limited | NSOX | 90 |
| Southern Railway System | SOU | 90 |
| British American Oil Company, Limited | BAOX, FOKX | 88 |
| Mars Incorporated | MWEX | 88 |
| Consolidated Mining and Smelting Company of Canada Limited |
CMSX | 84 |
| General American Transportation de Mexico, S. A. | GAMX | 80 |
| Tulsa Tank Line | TTEX | 79 |
| Railway Tank Car Service, Inc. | RCSX | 75 |
| Spencer Chemical Company | SCJX | 73 |
| Union Starch & Refining Company | USTX | 72 |
| Columbian Gasoline Corporation | SCNX | 71 |
| Shell Oil Company of Canada, Limited | SCAX, SCBX | 69 |
| Texas & Pacific Railway Co. | T&P | 68 |
| Houston Tank Car Company | HTX | 65 |
| Gulf, Mobile and Ohio Railroad Co. | GM&O | 63 |
| Missouri Pacific Lines - Gulf Coast Lines - New Orleans, Texas and Mexico Railway Co. |
NOT&M | 63 |
| Republic Tank Car Company | RTCX | 63 |
| Pennsylvania Salt Manufacturing Company of Washington | TELX | 62 |
| Southern Alkali Corporation | SACX | 61 |
| Cotton Belt Route | SSW | 59 |
| Champion Paper and FIbre Company | CPFX | 58 |
| General American Transportation Corp. - Cumberland Gasoline Corp. |
CGAX | 58 |
| Spokane, Portland & Seattle Railway Co. | SP&S | 58 |
| Canfield Tank Car Line | CANX | 57 |
| Stauffer Chemical Company (Southern California Branch) |
STLX | 56 |
| Mead Corporation, Tank Car Division | MCX | 52 |
| Interstate Transport Co. | ITCX | 51 |
| Fagan Tank Line | FTLX | 50 |
| Nichols Chemical Company, Limited | NLX | 50 |
| Cadillac Tank Car Company | CADX | 49 |
| Hi-Way Refineries, Ltd. | HWRX | 49 |
| Central Chemical, Division of Wilson & Co., Inc. |
CENX | 47 |
| Northern Tank Line Inc. | NTLX | 47 |
| Darling & Company | DACX | 46 |
| General American Transportation Corp. - Pennsylvania-Conley Tank Line |
PTX | 46 |
| Hegeler Zinc Company | HZX | 46 |
| Ohio Tank Car Company | AGCX | 46 |
| Teas Extract Company | TXCX, ATEX | 46 |
| Oil Tank Line Co. | OILX | 45 |
| Victory Tank Car Company | VTCX | 45 |
| Aluminum Company of Canada, Ltd. | ALCX | 44 |
| Simmons Oil & Refining Company | SAX | 44 |
| Colgate-Palmolive-Peet Co. | TPCX | 42 |
| Monsanto Chemical Company Merrimac Division |
MCHX | 42 |
| Bay Chemical Company - A Division of Morton Salt Company |
BAYX | 41 |
| Matthiessen & Hugeler Zinc Company | MHZX | 41 |
| Niacet Chemicals Division, United States Vanadium Corporation |
NIAX | 41 |
| Stauffer Chemical Company (Northern California Branch) |
STAX | 41 |
| Excelsior Refineries Ltd. | ERX | 40 |
| Flintkote Company of Canada, Inc. | FKRX | 40 |
| North American Cyanamid Limited | NCLX | 39 |
| Central of Georgia Railway | CG | 36 |
| Fuelane Corporation | FCX | 36 |
| General American Transportation Corp. - Inland Empire Refineries, Inc. |
IERX | 36 |
| Stauffer Chemical Company (Eastern Branch) |
SCHX | 36 |
| California Tank Car Line | CTCX | 35 |
| Cia. Distribuidora de Gas, S. A. | VELX | 35 |
| Koch Tank Line | OFKX | 35 |
| Virginia Smelting Company | VSX | 35 |
| Atlas Power Company | APCX | 34 |
| Aetna Oil Company, Inc. | LARX | 33 |
| Tennessee Eastman Corporation | ETCX | 33 |
| J. J. Clifford | CMCX | 32 |
| National Oil Company, Inc. | NOX | 31 |
| Stoll Oil Refining Co., Inc. | SOTX | 31 |
| Elmar Tank Line Co. | ETX | 28 |
| King Transportation Company | KINX | 28 |
| Louisiana & Arkansas Ry. Co. | L&A | 28 |
| Railway Accessories Company | RACX | 28 |
| Rohn & Haas Company | RAHX | 28 |
| General American Transportation Corp. - Wasatch Oil Company, Idaho Division |
WOX | 26 |
| Arkansas Company | ARKX | 26 |
| Tennese Coal, Iron & Railroad Company | TCIX | 26 |
| Ansul Chemical Company | ACCX | 25 |
| Commodities Car Co., Inc. | CMWX | 25 |
| W. R. Grace & Co. | OVOX | 25 |
| Portsmouth Division, Detroit Steel Corporation |
PSLX | 25 |
| W. H. Barber Company | BTLX | 24 |
| Chesapeake & Ohio | C&O | 24 |
| Globe Oil & Refining Company | LMRX | 24 |
| Jones & Laughlin Steel Corporation | JLSX | 24 |
| Lewis Tar Products Co. | LTPX | 24 |
| Youngstown Sheet & Tube Co. | YSTX | 24 |
| Cliffs Dow Chemical Company | CDKX | 23 |
| Speas Company | SVMX | 23 |
| Morrell Tank Line | MTX | 22 |
| Protane Corporation | PBGX | 22 |
| Ford Motor Company | FRDX | 21 |
| Industrias Unidas de Nuevo Laredo, S. A. | LUX | 21 |
| Robeson Process Company | RPCX | 21 |
| Belcher Oil Company | BEPX | 20 |
| M L W X Company | MLWX | 20 |
| Monarch Molasses Company | MMX | 20 |
| Namarib Company | NLCX | 20 |
| Arkansas Fuel Oil Company | ANGX | 19 |
| United Distillers of America, Inc. | UDAX | 19 |
| Canada Packers Limited | HACX | 18 |
| Denver & Rio Grande Western Railroad (Standard Gauge) | D&RGW | 18 |
| Oklahoma Tank Car Co. | RX | 18 |
| American Agricultural Chemical Co. | AAX | 17 |
| Buffalo Electro-Chemical Co., Inc. | BECX | 17 |
| Butte, Anaconda & Pacific Railway | BAP | 17 |
| McCloud RIver Railroad Co. | MR | 17 |
| Louis Stern Sons, Inc. | LSSX | 17 |
| Brown Company | BCX | 16 |
| Diminion Tar & Chemical Co., Limited | DTCX | 16 |
| Export Tank Lines | ETLX | 16 |
| New Jersey Zinc Company (of Pa.) | NJZX | 16 |
| Fred Rives Transportation Company | FRTX | 16 |
| Wilcox Oil Company | HWX | 16 |
| Ferrocarriles S. C. O. P. | SCOP | |
| Detroit Chemical Works | DCWX | 15 |
| Ethyl-Dow Chemical Company | EDCX | 15 |
| General American Transportation Corp. - Baker Castor Oil Co. |
BCOX | 15 |
| Sociedd Nacional de Productores de Alcohol | SNAX | 15 |
| Stauffer Chemical Company | STIX | 15 |
| Weirton Steel Company | WSX | 15 |
| Western Tank Line | WTLX | 15 |
| Belle Alkali Company | BAKX | 14 |
| R. H. Bogle Company | RHBX | 14 |
| Calco Chemical Division - American Cyanamid Company | CALX | 14 |
| Chickasha Cotton Oil Company | CCOX | 14 |
| E. T. Schoenwald | ETSX | 14 |
| Tennessee Products & Chemical Corporation | TPDX | 14 |
| Philadelphia Quartz Co. of California | PQCX | 13 |
| Shawinigan Products Corporation | SPKX | 13 |
| Westvaco Chemical Corporation | WVCX | 13 |
| Alton and Southern Railroad | AL&S | 12 |
| Cook Paint & Varnish Company | CPVX | 12 |
| Houston Packing Co. | HPX | 12 |
| Leas & McVitty, Inc. | LMVX | 12 |
| Pacific Lumber Company | TPLX | 12 |
| Quanah, Acme & Pacific Ry. Co. | QAP | 12 |
| Shawinigan Chemicals Limited | SWPX | 12 |
| Trinity Cotton Oil Division, of The Best Foods, Inc. |
TCOX | 12 |
| Norfolk & Western Railway Company | N&W | 11 |
| Armstrong Cork Company | ACKX | 11 |
| Central States Oil Co. | IMRX | 11 |
| Durkee Famous Foods, Division of the Glidden Company |
DFFX | 11 |
| Mineral Point Zinc Division, The New Jersey Zinc Company |
MPZX | 11 |
| Ace Tank Car Company | ATCX | 10 |
| J. T. Baker Chemical Co. - Taylor Chemical Division | JTBX | 10 |
| Commonwealth Edison Company | CWEX | 10 |
| Compania Mexicana de Comercio Extrior, S. A. | MCEX | 10 |
| Derby Oil Company | DOX | 10 |
| Hirsch Bros. & Co., Inc. | HBAX | 10 |
| Iron & Steel Products, Inc. | ISPX | 10 |
| Jennison-Wright Corporation | JWX | 10 |
| Lutz & Schramm Inc. | LASX | 10 |
| Milwaukee Solvay Coke Company | MSKX | 10 |
| Royster Chemical Works | RCWX | 10 |
| Seaboard Air Line Railroad Company | SAL | 10 |
| Van Iderstine Company | VICX | 10 |
| William K. Warren | WKWX | 10 |
| American Extract Company | AECX | 9 |
| American Sugar Refining Company | ASRX | 9 |
| Big West Oil Company of Montana | BWTX | 9 |
| Canada Starch Co., Ltd. | CSTX | 9 |
| Chipman Chemical Company, Inc. | CCEX | 9 |
| Crucible Steel Company of America | CSAX | 9 |
| Currie Products Limited | CPLX | 9 |
| General Electric Company | GEX | 9 |
| C. C. Lang & Son, Inc. | LSX | 9 |
| J. R. Lawrence | JRLX | 9 |
| Long-Bell Lumber Company | LBX | 9 |
| Mexican Pacific Railroad Co. | M del P | 9 |
| Missouri Pacific Lines - Gulf Coast Lines - St. Louis, Brownsville & Mexico Railway |
SB&M | 9 |
| Mutual Chemical Company of America | MCCX | 9 |
| Nealco-Monsanto Company | NEAX | 9 |
| Old Hickory Chemical Company | OHCX | 9 |
| Riverside Acid & Inhibitor Co. | RAWX | 9 |
| Quaker State Oil Refining Corporation | QSMX | 9 |
| D. P. Tafe | DPTX | 9 |
| Taylor-Colquitt Co. | TCPX | 9 |
| United States Rubber Company | USRX | 9 |
| H. Earl Clack Company | KLAX | 8 |
| Dominion Alkali & Chemical Company, Ltd. | DALX | 8 |
| Duval Engineering & Contracting Company | DECX | 8 |
| Eastman Kodak Company | EKCX | 8 |
| Interlake Iron Corporation | IICX | 8 |
| Panoma Corporation | PANX | 8 |
| Rural Natural Gas Company | RNGX | 8 |
| St. Regis Paper Company, West Fork Logging Division |
WFLX | 8 |
| Stauffer Chemical Company | STNX | 8 |
| Utilities Distributors, Inc. | UDIX | 8 |
| Leonard Warden | WGSX | 8 |
| American Cyanamid Company | CYX | 7 |
| Gas-Oil Products, Inc. | GOPX | 7 |
| Hinkley & Schmitt | HSTX | 7 |
| Kimberly-Clark Corporation | KCCX | 7 |
| Los Angeles Soap Company | LOSX | 7 |
| Missouri Pacific Lines - Sugar Land Railway Co. | SL | 7 |
| Norfolk Southern Railway Co. | NS | 7 |
| Oldbury Electro-Chemical Company | OECX | 7 |
| Pacific Electric Ry. Co. | PE | 7 |
| St. Lawrence Starch Company Limited | SLAX | 7 |
| Schenectady Varnish Company, Inc. | SVCX | 7 |
| American Turpentine & Tar Co., Ltd. | ATTX | 6 |
| Bernuth, Lemboke Co., Inc. | BLCX | 6 |
| Capital City Products Co. | CAPX | 6 |
| Continental Turpentine & Rosin Corporation, Inc. | CRTX | 6 |
| Dominion Linseed Oil Co., Limited | DLOX | 6 |
| Lyle Branchflower Company | LBRX | 6 |
| East Tennessee and Western North Carolina Railroad Company | ET&WNCRR | 6 |
| Fels & Company | FELX | 6 |
| Polymer Corporation Limited | PCLX | 6 |
| Productos Forestales, S. A. | PFSX | 6 |
| Pure Carbonic, Incorporated | PCIX | 6 |
| Republic Steel Corporation | RSCX | 6 |
| Steel Company of Canada, Limited | TSCX | 6 |
| Wisconsin Rendering Company | WRCX | 6 |
| Minneapolis & St. Louis Ry. Co. | M&StL | 5 |
| Alberta Linseed Oil Company, Limited | ALOX | 5 |
| Algonquin Chemical Company | ACMX | 5 |
| Apex Oil Company | APEX | 5 |
| Barium Reduction Corporation | BRX | 5 |
| Canada & Dominion Sugar Co., Ltd. | DSLX | 5 |
| Crossett Chemical Company | CCMX | 5 |
| Cutler-Hammer, Inc. | CPLX | 5 |
| River Terminal Railway Company | RT | 5 |
| American Viscose Corporation - Sylvania Division | SYLX | 5 |
| Eagle Cotton Oil Company | ECOX | 5 |
| Great Lakes Steel Corporation | GLSX | 5 |
| Gregory-Robinson-Speas, Inc. | OCVX | 5 |
| J. M. Huber Corporation | JMHX | 5 |
| Martin Oil Service, Inc. | MOSX | 5 |
| Tank Line Service Incorporated | TLSX | 5 |
| Trojan Poweer Co. | TPX | 5 |
| Westland Oil Company | WOLX | 5 |
| Wheeler, Reynolds & Stauffer | WRSX | 5 |
| Wheeling Steel Corporation | WSLX | 5 |
| Home Gas Corporation | HGCX | 4 |
| Catalin Corporation of America | CCNX | 4 |
| Chesapeake & Ohio Railway Company - Pere Marquette District |
PM | 4 |
| Louisiana & North West R. R. Co. | L&NW | 4 |
| Missouri Tank Car Corporation | LMTX | 4 |
| Port Angeles Western Railroad Company | PAWRR | 4 |
| R. J. Allison Company | RJAX | 4 |
| Samuel Cabot Inc. | SCIX | 4 |
| Colorado Fuel and Iron Corporation | CFIX | 4 |
| Conway Springs Water Co,. | CSWX | 4 |
| Cuero Cotton Oil & Mfg. Company | CUMX | 4 |
| Fiske Brothers Refining Company | FBRX | 4 |
|
Forest Products Chemical Co. |
FPDX | 4 |
| National Silicates Limited | NSLX | 4 |
| National Zinc Company, Inc. | NZX | 4 |
| Neville Company | NEVX | 4 |
| P. D. George Company | PDGX | 4 |
| Goar's Service & Supply | GSSX | 4 |
| Great Bear Spring Co. | GBSX | 4 |
| Haskins Brothers & Company | HBSX | 4 |
| Hately Brothers Company | HBX | 4 |
| Holly Sugar Corporation | HLYX | 4 |
| Hygrade Food Products Corporation | HYTX | 4 |
| T. A. D. Jones & Co., Inc. | TADX | 4 |
| Newport Industries, Inc. | NCOX | 4 |
| Oregon-American Lumber Corporation | OALX | 4 |
| Petrolite Corporation, Limited | TOLX | 4 |
| Radio Oil Refiners Ltd. | RORX | 4 |
| Chas. L. Read & Co., Inc. | CLRX | 4 |
| Staley Milling Company | SMX | 4 |
| Tennessee Corporation | TENX | 4 |
| Texas Mexican Railway Company | TM | 4 |
| Warren & Saline RIver Railroad Company | W&SRRR | 4 |
| Texas Tanning Extract Company | TTNX | 4 |
| Adirondack Bottled Gas Corporation | ABX | 3 |
| Austin Powder Company | AUPX | 3 |
| Byerlyte Corporation | BYAX | 3 |
| California Cedar Products Company | CPSX | 3 |
| California Cotton Oil Corporation | COCX | 3 |
| Central Farm Products Company | CFPX | 3 |
| Colorado & Wyoming Railway | C&W | 3 |
| Disco Company | DSCX | 3 |
| Elkland Leather Co., Inc. | ELCX | 3 |
| General Aniline & Film Corporation | GAWX | 3 |
| Jordan Company | JCOX | 3 |
| Kaiser Steel Corporation | KCIX | 3 |
| Lehigh Valley Railroad | LV | 3 |
| Marathon Corporation | MPMX | 3 |
| Oscar Mayer & Co. | CMTX | 3 |
| Palomar Oil and Refining Corporation | PRX | 3 |
| Puget Sound Pulp & Timber Co. | PSTX | 3 |
| A. M. Richter Sons Company | RSX | 3 |
| Sessions Company, Inc. | SESX | 3 |
| Standard Chemical Co., Ltd. | SCLX | 3 |
| M. B. Suydam Division, Pittsburgh Plate Glass Co. |
MBSX | 3 |
| Hiram Walker & Sons, Limited | HWSX | 3 |
| Texas Vegetable Oil Company | TVOX | 3 |
| Turpentine & Rosin Factors, Inc. | TRFX | 3 |
| Western Food Products Company | WFPX | 3 |
| Westinghouse Electric Corporation, Benolite Department |
BNX | 3 |
| J. J. White Products Company (J. J. White, Sole Owner) |
JJWX | 3 |
| Amalgamated Sugar Company | ASCX | 2 |
| E. Berghausen Chemical Company | EBCX | 2 |
| Canada Linseed Oil Mills, Ltd. | CLOX | 2 |
| Canadian Breweries Limited | CBX | 2 |
| Caterpillar Tractor Company | CTX | 2 |
| Central Packing Company, Inc. | CPX | 2 |
| Cities Fuel Corporation | CFCX | 2 |
| Davison Chemical Corporation | DCCX | 2 |
| F. D. Cline Construction Company | FDCX | 2 |
| Columbian Carbon Company, Magnetic Pigment Division |
MPX | 2 |
| Cornwell Chemical Company | CLCX | 2 |
| Diamond Alkali Co. of California | DCX | 2 |
| Dyson's Limited | DLX | 2 |
| Fabrica de Jabon "La Reinera", S. A. | FLRX | 2 |
| Foley Butane Company, Inc. | FBCX | 2 |
| L. C. Forman & Sons, Inc. | LCFX | 2 |
| Glidden Company, Naval Stores Division |
GPX | 2 |
| Green Bay Food Company | GBFX | 2 |
| Gulf States Creosoting Company | GSCX | 2 |
| E. Kahn's Sons Company | EKTX | 2 |
| Kuner-Empson Company | KECX | 2 |
| KVP Company, Limited | KVPX | 2 |
| Lamp Department of General Electric Company | ILDX | 2 |
| Longview, Portland & Northern Railway | LP&N | 2 |
| Mangels, Herold Co., Inc. | MHTX | 2 |
| Modern Sanitary Rendering Co., Inc. | MSRX | 2 |
| Montana-Dakota Utilities Co. | MDUX | 2 |
| Montrose Beef Company | MBX | 2 |
| National Aniline Division, Allied Chemical & Dye Corporation |
NANX | 2 |
| Nevada Northern Railway Company | NN | 2 |
| Ozark-Mahoning Company | OZCX | 2 |
| P. J. O'Donnell & Sons | PJOX | 2 |
| Ozone Company, Inc. | OZX | 2 |
| Peoples Natural Gas Company | PNGX | 2 |
| Peoples Refining Company | PEPX | 2 |
| Pioneer Products Company | PPX | 2 |
| A. F. Pringle & Co. Inc. | PRFX | 2 |
| Resinera Uruapan, S. A. | RUSX | 2 |
| John A. Roebling's Sons Co. | JARX | 2 |
| Shallow Water Refining Co. | SWRX | 2 |
| Sherwin-Williams Co. of Canada, Limited | SWCX | 2 |
| Smith-Douglas Company, Inc. | SDIX | 2 |
| Sunland Refining Corporation | SRX | 2 |
| Trinidad Leasholds (Canada) Limited | TLCX | 2 |
|
Tucson, Cornelia and Gila Bend Railroad Company |
TCG | 2 |
| Unites States Atomic Energy Commission | ATMX | 2 |
| United States Sugar Corporation | USSX | 2 |
| J. S. Young Company | JSYX | 2 |
| American Smelting & Refining Company | ASX | 1 |
| Apache Powder Company | APHX | 1 |
| Ashley, Drew and Northern Ry. Co. | AD&N | 1 |
| Atlas Chemical Company, Ltd. | ACHX | 1 |
| Bamberger Railroad Co. | B | 1 |
| Belt Railway Company of Chicago | BRC | 1 |
| Berwind-White Coal Mining Co. | BWCX | 1 |
| James B. Clow & Sons | JBCX | 1 |
| Colorado & Southern Railway | C&S | 1 |
| Collins Construction Co. | COLX | 1 |
| Conroe Creosoting Company | CNRX | 1 |
| Crystal Springs Water Company, Inc. | CWX | 1 |
| Delaware, Lackawanna & Western R. R. Co. | DL&W | 1 |
| Denver & Rio Grande Western Railroad Company (Standard Gauge) | D&SL | 1 |
| Distillation Products Industries, Division of Eastman Kodak Company |
DPIX | 1 |
| Donner-Hanna Coke Corporation | DUX | 1 |
| Dothan Oil Mill Company | DOMX | 1 |
| Eastern Corporation | EMCX | 1 |
| Elgin, Joliet and Eastern Railway Co. | EJ&E | 1 |
| El Pino, S. A. | EPX | 1 |
| A. R. Eppenauer | EPPX | 1 |
| Eston Chemicals, Inc. | ESTX | 1 |
| Flamingo Spring Water Company | FSWX | 1 |
| Frost Paint & Oil Corporation | FPOX | 1 |
| Gaspesia Sulphite Company, Ltd. | GSPX | 1 |
| Gifford-Hill & Company, Inc. | GHX | 1 |
| Great Lakes Refining, Division of Petco Corporation |
PETX | 1 |
| Kalamazoo Rendering Works | KRWX | 1 |
| Kansas Power Company | KPRX | 1 |
| Lehigh, Incorporated | LGX | 1 |
| Lever Brothers Limited | BLBX | 1 |
| Jos. A. Likely, Limited | JALX | 1 |
| Marden-Wild Corporation | MWKX | 1 |
| Master Lubricants Company | MLX | 1 |
| McCook Rendering Company | MCRX | 1 |
| H. L. Mills | HLMX | 1 |
| Monarch Refineries, Inc. | MRIX | 1 |
| National Gas Company | NGCX | 1 |
| Pacific Vegetable Oil Corporation | PVOX | 1 |
| Peterson Manufacturing Co., Inc. | PMCX | 1 |
| Pierce & Stevens, Inc. | PSX | 1 |
| Reading Company | RDG | 1 |
| W. B. Riley | WBRX | 1 |
| Santa Maria Valley Railroad | SMV | 1 |
| Saunders Petroleum Company | SPCX | 1 |
| Schoenwald Petroleum Company | OHSX | 1 |
| E. D. Sloan | EDSX | 1 |
| Southern Indiana Liquified Gas Company | SILX | 1 |
| Standard Brands Limited | SBLX | 1 |
| Standard Ultramarine Company | SUX | 1 |
| M. Steffen & Company, Inc. | STX | 1 |
| Stickney & Poor Spice Co. | SPSX | 1 |
| Sumter & Choctaw Railway Co. | S&C | 1 |
| Swift Canadian Co., Limited | SCDX | 1 |
| Sydney & Louisburg Railway Co. Cumberland Railway & Coal Co. |
S&L, CD&C | 1 |
| Tank Gas Corporation | TGCX | 1 |
| Textiles Monterrey, S. A. | TMOX | 1 |
| Thompson-Hayward Chemical Company | THKX | 1 |
| True's Oil Company | TOCX | 1 |
| Virginia-Carolina Chemical Corporation, Phosphate Mining Department |
VCCX | 1 |
| Wayne Chemical Products Company | WCPX | 1 |
| Tank Car Corporation of America | HMHX, NAMX | unknown |
